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Structural Performance Evaluation and Monitoring of Reinforced Concrete Shear Walls Affected by Alkali-Silica Reactions
Journal of Advanced Concrete Technology ( IF 1.6 ) Pub Date : 2021-05-26 , DOI: 10.3151/jact.19.477
Shohei Sawada 1 , Yoshikazu Takaine 2 , Takashi Okayasu 2 , Arinori Nimura 2 , Ryu Shimamoto 3
Affiliation  

Lateral loading tests using reduced reinforced concrete (RC) walls affected by alkali-silica reactions (ASR) and their simulation analyses were performed in order to evaluate the influence of ASR on the structural performance of shear walls that act as seismic resistant members in nuclear power facilities. The state of RC walls was also measured by several techniques to assess applicable monitoring methods during ASR expansion. The transition of the elastic wave velocity of the walls by the ultrasonic method has a good co-relationship with the transition of the static elastic modulus of the cylindrical specimens, indicating that non-destructive testing could capture the degradation trend of concrete due to ASR expansion. The initial stiffness of the ASR specimens became slightly smaller than that without ASR, but the maximum strength remained at the same level with or without ASR. Based on the results of experiments and analyses, a practically appropriate structural performance evaluation method and a monitoring method of ASR affected RC members were proposed.



中文翻译:

碱硅石反应影响下钢筋混凝土剪力墙的结构性能评估与监测

使用受碱-硅反应(ASR)影响的还原钢筋混凝土(RC)壁进行了侧向荷载试验,并进行了模拟分析,以评估ASR对作为核电中抗震构件的剪力墙的结构性能的影响设施。RC墙的状态也通过多种技术进行了测量,以评估ASR扩展过程中适用的监控方法。超声方法引起的墙体弹性波速的变化与圆柱试样静弹性模量的变化具有良好的相关性,表明无损检测可以捕捉由于ASR膨胀引起的混凝土的降解趋势。 。ASR标本的初始刚度比没有ASR的刚度小一些,但是无论是否使用ASR,最大强度都保持在同一水平。根据实验和分析的结果,提出了一种实用的结构性能评价方法和对受ASR影响的钢筋混凝土构件的监测方法。

更新日期:2021-05-25
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